Create User Rest Endpoint Error

System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source)
   at Telligent.Evolution.Api.Services.TranslatedExceptionService.Invalid(CSException ex, String exceptionResourceName, IReadOnlyList`1 arguments, IReadOnlyList`1 validationErrors)
   at Telligent.Evolution.Platform.Components.Exceptions.ValidationException.GetTranslatedMessage(ITranslatedExceptionService translatedExceptionService)
   at Telligent.Evolution.Components.CSException.GetUserRenderableMessage()
   at Telligent.Evolution.Extensibility.Api.Entities.Version1.Error..ctor(Exception ex)
   at Telligent.Evolution.Extensibility.Api.Entities.Version1.AdditionalInfo..ctor(Exception ex)
   at Telligent.Evolution.Extensibility.Api.Version1.Users.Create(String username, String password, String privateEmail, UsersCreateOptions options)
   at Telligent.Evolution.Rest.Resources.Users.UserController.Create(UserCreateRequest request)

System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source)
   at Telligent.Evolution.Api.Services.TranslatedExceptionService.Invalid(CSException ex, String exceptionResourceName, IReadOnlyList`1 arguments, IReadOnlyList`1 validationErrors)
   at Telligent.Evolution.Platform.Components.Exceptions.ValidationException.GetTranslatedMessage(ITranslatedExceptionService translatedExceptionService)
   at Telligent.Evolution.Components.CSException.GetUserRenderableMessage()
   at Telligent.Evolution.Extensibility.Api.Entities.Version1.Error..ctor(Exception ex)
   at Telligent.Evolution.Extensibility.Api.Entities.Version1.AdditionalInfo..ctor(Exception ex)
   at Telligent.Evolution.Extensibility.Api.Version1.Users.Create(String username, String password, String privateEmail, UsersCreateOptions options)
   at Telligent.Evolution.Rest.Resources.Users.UserController.Create(UserCreateRequest request)

i tried adding another attributes and it created the user but still return error 500.

{
"Username" : "jvictor",
"Password" : "jvictor",
"PrivateEmail" : "jvictor@localhost.com",
"EnableDisplayName" : "true",
"AllowSiteToContact" : "false",
"AllowSitePartnersToContact" : "false"
}

User was created but response:

{
"Users": null,
"User": null,
"Info": [],
"Warnings": [],
"Errors": [
"An unexpected error prevented your requested action from completing. The error has been logged for the administrator to review."
]
}